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STOCKS TO WATCH: AMZN, TWTR, GOOG, SINA, GM

Here’s a look at some of the stocks the Yahoo Finance team will be watching for you today.

Amazon (AMZN) just approved six new series for streaming on its Amazon Prime Instant Video service. The series were chosen after viewers voted and commented on 10 pilot episodes that were shown earlier this year. Amazon also said its first series "Alpha House" starring John Goodman will return for a second season. The announcement comes ahead of tomorrow's event where Amazon is the expected to unveil a streaming-video device that could rival Google's Chromecast and Apple TV.

Twitter (TWTR) is buying two European companies in an effort to expand its reach in "social TV." Twitter is buying France's Mesagraph and the U.K.'s SecondSync, each of which has existing relationships with broadcasters in their home market. Twitter is looking to expand its integration into television programs around the world.

Google (GOOG) is in its last day of trading before tomorrow's stock split that will create a new class of Google shares. Meanwhile, Google and other Internet companies blasted Turkey for blocking access to social media sites during the country's local elections, according to The Wall Street Journal. The companies claim Turkey's telecom firms impersonated their servers in order to block Google's YouTube and Twitter. Prime Minister Erdogan's critics have used social media to voice opinions about him and an ongoing corruption scandal surrounding him. Erdogan has vowed to "eradicate" Twitter.

Weibo, a unit of Chinese internet giant Sina (SINA), will go public on the Nasdaq under the ticker symbol WB. Weibo is the "Twitter of China." The Beijing-based company hopes to raise $500 million in its initial public offering. Weibo currently has about half the users of Twitter.

Finally, we're watching General Motors (GM) ahead of testimony from CEO Mary Barra who is scheduled to testify before a House panel today and a Senate panel tomorrow about the company's handling of recalls after faulty ignition switches came to light. Meanwhile, GM has announced another new recall, this time for 1.3 million vehicles they say could experience power steering loss. The recall is for seven models made between 2004 and 2010. With this recall, General Motors has now recalled more than 6 million cars this year. The company said it will take a $750 million charge against its first quarter results to pay for the recalls.